"Millionaires likely would find legal ways to avoid paying higher taxes under President Barack Obama's proposed 'Buffett Rule'..."

"... a new congressional estimate finds.."

The proposal—spelled out in Mr. Obama's State of the Union address—would impose a 30% minimum tax rate on those who make more than $1 million a year. It is named for the billionaire investor Warren Buffett, who advocates higher taxes on the very wealthy.